开关电源中光耦隔离的几种典型接法对比研究

作者：杨仲望，金天均，吕征宇 日期：2007-07-06/span> 浏览：4219 查看PDF文档

                            开关电源中光耦隔离的几种典型接法对比研究
                                      杨仲望，金天均，吕征宇
                 （浙江大学 电力电子国家专业实验室， 浙江 杭州 310027）

摘 要：对于原/副边需要隔离的电源系统，光耦隔离是最为常用的方法之一。根据实际的多电平逆变器驱动电源中所需要的半桥辅助电源及反激式电源，对4种典型的光耦隔离反馈方式之间的区别及其不同的应用场合进行了研究。通过比较研究，给出了光耦反馈设计要点，得出了不同光耦反馈方式的适用场合。
关键词：隔离电源；光耦；隔离反馈；TLP521；TL431

Comparative study of different optocoupler feedback methods in the design of isolated power supplies
                      YANG Zhongwang, JIN Tianjun, LV Zhengyu
(National Laboratory of Power Electronic, Zhejiang University, Hangzhou 310027, China)

Abstract: Optocouplers are widely used in isolated power systems. An actual multilevel inverters auxiliary half bridge power system and a flyback power system were introduced. Four different kinds of optocoupler feedback methods and their application fields were also introduced. By comparing differences, some main rules for the designing of optocoupler feedback systems and how to choose the right one when using in different fields were provided.
Key words: isolated power systems; optocoupler; isolated feedback; TLP521; TL431

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